Method for Decoding and Encoding a Video Signal

Abstract

A method for decoding/encoding a video signal using an inter layer prediction process is disclosed. The method for decoding a video signal including several layer information includes: a) acquiring a first prediction signal for a current block of an enhancement layer and a residual signal based on at least a base layer block; b) smoothing the sum of the first prediction signal and the residual signal, and generating a second prediction signal for the current block; and c) reconstructing the current block based on the second prediction signal. Therefore, the method for decoding/encoding a video signal uses a variety of inter layer prediction methods according to the macroblock type of macroblocks of the current and base layers, and removes inter layer redundancy, resulting in increased coding efficiency.

1 . A method for decoding a video signal including several layer information comprising:
 a) acquiring a first prediction signal for a current block of an enhancement layer and a residual signal based on at least a base layer block;   b) smoothing the sum of the first prediction signal and the residual signal, and generating a second prediction signal for the current block; and   c) reconstructing the current block based on the second prediction signal.   
   
   
       2 . The method according to  claim 1 , wherein the reconstructing step c) of the current block includes:
 adding the second prediction signal for the current block and a residual signal; and   reconstructing the current block.   
   
   
       3 . The method according to  claim 1 , wherein the generating step a) of the first prediction signal includes:
 generating the first prediction signal on the basis of at least one prediction mode information from among the current block and a block of the base layer.   
   
   
       4 . The method according to  claim 3 , wherein the prediction mode information of the current block is indicative of an intra prediction mode. 
   
   
       5 . The method according to  claim 4 , wherein the prediction mode information of the base layer block is indicative of an inter prediction mode. 
   
   
       6 . The method according to  claim 3 , wherein the prediction mode information of the base layer block is indicative of an inter prediction mode. 
   
   
       7 . The method according to  claim 2 , wherein the residual signal is based on the enhancement layer. 
   
   
       8 . The method according to  claim 1 , wherein the residual signal includes an umsmapled video signal based on the base layer block. 
   
   
       9 . The method according to  claim 8 , wherein the upsampling increases resolution of the base layer according to resolution of the enhancement layer.